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    <script>
        //编写函数norepeat(arr) 将数组的重复元素去掉，并返回新的数组

        // var arr = [1, 1, 1, 2, 3, 4, 1, 3, 6, 7, 3, 5]
        function norepeat(arr) {
            for (var i = 0; i < arr.length; i++) {
                for (var j = i + 1; j < arr.length; j++) {
                    if (arr[i] === arr[j]) {
                        arr.splice(j, 1)
                        j--
                    }
                }
            }
            return arr
        }
        console.log(norepeat([1, 1, 1, 2, 3, 4, 1, 3, 6, 7, 3, 5]))
    </script>
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